astro.wikisort.org - Asteroid

77185 Cherryh, provisional designation 2001 FE₉, is a background asteroid from the central regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 20 March 2001, by American amateur astronomers Don Wells and Alex Cruz at the George Observatory in Needville, Texas. The dark asteroid was named for American writer C. J. Cherryh.[1]

77185 Cherryh

Orbital diagram of Cherryh
Discovery [1]
Discovered by	D. Wells A. Cruz
Discovery site	George Obs.
Discovery date	20 March 2001
Designations
MPC designation	(77185) Cherryh
Named after	C. J. Cherryh [1] (American writer)
Alternative designations	2001 FE9 · 1998 TG27
Minor planet category	main-belt [1][2] · (middle) background [3][4]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc	27.71 yr (10,121 d)
Aphelion	3.0501 AU
Perihelion	2.1431 AU
Semi-major axis	2.5966 AU
Eccentricity	0.1746
Orbital period (sidereal)	4.18 yr (1,528 d)
Mean anomaly	70.105°
Mean motion	0° 14m 8.16s / day
Inclination	3.1456°
Longitude of ascending node	12.636°
Argument of perihelion	231.33°
Physical characteristics
Mean diameter	3.985±0.166 km[5]
Geometric albedo	0.049±0.009[5]
Absolute magnitude (H)	15.9[1][2]

Orbit and classification

Cherryh is a non-family asteroid from the main belt's background population.[3][4] It orbits the Sun in the central asteroid belt at a distance of 2.1–3.1 AU once every 4 years and 2 months (1,528 days; semi-major axis of 2.6 AU). Its orbit has an eccentricity of 0.17 and an inclination of 3° with respect to the ecliptic.[2] The body's observation arc begins in October 1990, with a precovery taken by Spacewatch, more than 10 years prior to its official discovery observation at Needville.[1]

Naming

This minor planet was named by the discovering members of the Fort Bend Astronomy Club (FBAC), after C. J. Cherryh (born 1942), the award-winning American science fiction and fantasy author.[1] The official naming citation was published by the Minor Planet Center on 13 July 2004 (M.P.C. 52327).[6]

Physical characteristics

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cherryh measures 3.985 kilometers in diameter and its surface has an albedo of 0.049.[5] The asteroid's spectral type is unknown. Based on its low geometric albedo it is likely a carbonaceous C-type asteroid. As of 2018, no rotational lightcurve of Cherryh has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2][7]

References

External links

• FBAC Asteroid and HEAT Team Page, FBAC Asteroid Discoveries at the George Observatory (archived)
• Don Wells, home page (archived)
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (75001)-(80000) – Minor Planet Center
• 77185 Cherryh at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 77185 Cherryh at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (77185) Cherryh

(77185) Cherryh ist ein im mittleren Hauptgürtel gelegener Asteroid. Er wurde am 20. März 2001 von den US-amerikanischen Amateurastronomen Don J. Wells und Alex Cruz am George-Observatorium (IAU-Code 735) entdeckt. Das George-Observatorium gehört zum Houston Museum of Natural Science und befindet sich im Brazos Bend State Park des Houstoner Vorortes Needville. Sichtungen des Asteroiden hatte es vorher schon am 15. und 20. Oktober 1998 an der auf dem Kitt Peak gelegenen Außenstation des Steward Observatory gegeben.[1]

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- [en] 77185 Cherryh

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